Cited by 69Pharmacogenetics and Drug MetabolismEstrogen and related hormone effectsGlutathione Transferases and Polymorphisms

Disturbed expression of phase I and phase II estrogen-metabolizing enzymes in endometrial cancer: lower levels of CYP1B1 and increased expression of S-COMT

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Hevir, Neli, Šinkovec, Jasna, Rižner, Tea Lanišnik·2011·Molecular and Cellular Endocrinology

Abstract

Expression levels of genes encoding phase I and phase II estrogen-metabolizing enzymes: CYP1A1, CYP1A2, CYP1B1, CYP3A5, CYP3A7, SULT1A1, SULT1E1, SULT2B1, COMT, UGT2B7, and GSTP1 were studied by real-time PCR in 38 samples of cancerous and adjacent control endometrium. We found significantly lower levels of CYP1B1 and CYP3A7, higher levels of SULT2B1, UGT2B7 and GSTP1, and no differences in expression of COMT, CYP1A1, CYP3A5, SULT1E1 and SULT2A1 in the endometrial cancers. The CYP1B1 and COMT proteins were also examined by Western blotting and immunohistochemical staining, supporting the real-time PCR analysis. Lower levels of CYP1B1 detected in cancerous endometrium suggest its important role in control, precancerous tissue. Additionally, we showed for the first time higher protein levels of soluble COMT in cancerous endometrium, and higher levels of membrane-bound COMT in control, precancerous endometrium. The importance of the changed ratio between soluble and membrane-bound COMT still needs to be evaluated in further studies.

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Crossref · 10.1016/j.mce.2010.09.011

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Authors
Hevir, N., Šinkovec, J., & Rižner, T. L.
Affiliations
  • University of Ljubljana (SI)
  • Ljubljana University Medical Centre (SI)
Corresponding author
Rižner, Tea Lanišnik
Venue
Molecular and Cellular Endocrinology
Publisher
Elsevier BV
Published
2011-01-01
Volume
331
Issue
1
Pages
158-167
ISSN
0303-7207 (ISSN-L)
OpenAlex
W2099128770
Cited by
69
References
56
Citations by year
2026: 3 · 2025: 3 · 2024: 5 · 2023: 4 · 2022: 1 · 2021: 3 · 2020: 3 · 2019: 5 · 2018: 4 · 2017: 6 · 2016: 6 · 2015: 2 · 2014: 9 · 2013: 5 · 2012: 5
FWCI
4.84
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • Trinity's Access to Research Output (TARA) (Trinity College Dublin) (submittedVersion)
Topics
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Glutathione Transferases and Polymorphisms
Keywords
endometrial cancer, estrogen metabolism, phase I enzymes, phase II enzymes, CYP1B1, CYP3A7, catechol-O-methyltransferase, membrane-bound COMT, SULT2B1, UGT2B7, GSTP1, CYP1A1, CYP1A2, CYP3A5, SULT1A1, SULT1E1, gene expression
MeSH terms
Adult, Aged, Aged, 80 and over, Aryl Hydrocarbon Hydroxylases, Catechol O-Methyltransferase, Endometrium, Estradiol, Estrogens, Female, Humans, Hydroxylation, Isoenzymes, Middle Aged, Glucuronosyltransferase, Sulfotransferases, Down-Regulation, Gene Expression Regulation, Enzymologic, Gene Expression Regulation, Neoplastic, Endometrial Neoplasms, Metabolic Detoxication, Phase I, Metabolic Detoxication, Phase II, Glutathione S-Transferase pi, Cytochrome P-450 CYP1B1

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